Four-wheel-drive truck.



A. &,D. S. STEWART.

FOUR WHEEL DRIVE TRUCK.

APPLICATIQN HLED Nov. 11. 191e.

3E, mi?

2 SHEETS-#SHEET 2.

UNITED sjTAiri-ts PATENT oF-FICE "ALEXANDER STEWART, oricLINToNvILLE, AND DAVID s. STEWART, or armaron,

WISCONSIN, ASSIGNORS T FOUR WHEEL TRACTOR CO., 0F CLINTONVILLE, WIS

CON SIN.

"TOUR-WHEEL-DRIVE TRUCK.

' Application led November 11, 1916. Serial No. 130,781.

To all whom it mayy concern:

Be it known that we, ALEXANDER S'rnwAnr and Dario S. STEwaR'n/jboth citizens of the United States, and residents ot Clintonville, in the county of 'Vaupaca an'd State of lYisconsin, and of Appleton, inthe county of Outagamie and State of Wisconsin, respectively, have invented certain new and useful Improvements in FourfVVheel-Drive Trucks; and we do hereby declare that the following is a full, clear, and exact description thereof. Y. v

The present invention relates to new and v usci-'u1 lmprovementsin heavy duty motor trucks 4of the four Wheel -drive type, and more particularly of the type shown in Pat; ent No. 1105218 granted to David S. Stewart July 28, 1914. i

It is in general the 'object of the present invention to simplify and otherwise improve the structure and to increase the eliciency of motor driven vehicles of this nature.

In view of the rough roads encountered by trucks of this nature a consequently relatively greatV amount of shockl is imparted thereto, and it is an important object of the invention to provide an arrangement where-v in the motor of the truck 1s afforded a resihent support .to relieve shocks therefrom. It is more'specifically an object in this connection to provide upper and lower spring 'connected chassis and to provide an efficientv with vthe front .wheels for simultaneous steerin movement therewith, or may be released from said front' Wheelspand locked tothe chassis.

1With the above 'and other objects and advantages in view the invention resides more particularly in the novel combination, arrangement and formation of parts herein described and pointed out inthe appended claims. In the drawings: p

Figure l isda vertical longitudinal sectional View of a -four wheel drive truckfem-v` -the body of the truck being" lllustratedl in conventional bodying the present invention,

outline` and the plan view being indicated by the line 1- -1 of Fig.

- Fig. 2 is plan view of the chassis structure of the itruck.

Fig. 3 is `a transverse sectional view throughthe rear axle portion'of the truck on the line 3`3 of Fig. 1, andfshowing the means .for controlling' the steering movement ofthe rear axle.

Reerringnow more particularly to theaccompanylng drawings, the truck-shown thereincomprises an upper chassis includ-` ing the side sills-5 and end sills 6 and lear- .rying la conventionally' designated truck body 7, and disposed below this chassis 5 is arelatively smaller chassis including side sills 8 and transverse'. sills Sand which is` connected with the upper chassis by ex- 'pansile springs 10 upstanding at its corners and engaging'transverse sills 1l of the 'upper chassis The chassis vare held again-st relatively Specification of Letters Patent. Patented J 1113r 31, '1917. I

horizontal movements preferably by.' pairs of pivotally connected links 12 pivoted thereto at their corner portions, although it will be appreciated that conventional elliptical springs may be sub-, stituted fothe eXpansile coil springs 10. The forward end of the upper chassis carries the engine 13 and usual transmission "14. J ournaled in' a bearing l5 carried by atransverse sillv of the lower chassis is a longitudinally extending stub-shaft 16 and this stub-shaft and the transmission are connected by an extensible shaft 17 having` its ends universally coupled at 18 to the transmission and stub-shaft. Thus the engine and transmission, being carried by the upper spring mounted chassis, are relieved of the shock and vibration incidental to travel over'rough roads, and the power of the engine is efficiently transmit-ted to the loWer Adjacent its ends, the lower chassis is provided with pairs of cross sills 19 which carry centrally disposed bearing blocks 20 in each of which is jf'iurnaled.a vertical pivot pin 21 carried by a block 21, and to 8 5 in some instances chassis, front and rear pivoted wheeled axles, means for steering the front axle, a bar pivoted to the real axle, a spring' urged movable member'carried by the rear axle and engageable with the bar to hold said axle and bar against relative. pivotal movenient, means connecting said bar Withthe front axle, and means carried by the chassis for operating said movable memberv torelease the bar and rear axle and to hold the rear axle against pivotal movement with respect tothe chassis.

5. A motor driven Vehicle including achas'sis, front and rear pivoted Wheeled axles, means for steering the front axle, a bar pivoted to the rear axle, links connectpivoted in the rean axle and engageable with the bar to hold said axle and bar against relative pivotal movement, a member carried by the chassis and movable to rock said lever to release the bar and rear axle and to hold the rear axle againstpivotal movement With respect to the chassis, and means for manipulating the lmember carried by the chassis, said `means being ing said bar and the front axle, a lever in juxtaposition with the means for steering the front axle. l

6. A motor driven vehicle including a chassis, frontY and rear pivoted Wheeled axles, means for steering the front axle, a bar pivoted to the rear axle, links connecting said bar and the front axle, a spring urged levez' mounted in the rear axle and l adapted to engage the bar to hold said vaxle and bar'against relative pivotalmovement,

4a slidable bar carried by the' chassis and movable to depress one end of the rocking lever to release the bar and rear, axle and to hold therear axle against pivotal movement With respect to the chassis, and an operating lever located Within reach of the driver of said vehicle and in connection with said slidable b ar7 substantially as described.

In testimony that We claim the foregoing We have hereunto set our hands at Appleton, in the county of Outagamie and State of Wisconsin, in the presence of two Witnesses.

Witnesses v WM. CAMPBELL, FRANK GRoH, 

